51751812 has 48 divisors (see below), whose sum is σ = 139087872. Its totient is φ = 14670240.

The previous prime is 51751811. The next prime is 51751813. The reversal of 51751812 is 21815715.

It is an interprime number because it is at equal distance from previous prime (51751811) and next prime (51751813).

It is a self number, because there is not a number n which added to its sum of digits gives 51751812.

It is not an unprimeable number, because it can be changed into a prime (51751811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8653 + ... + 13355.

It is an arithmetic number, because the mean of its divisors is an integer number (2897664).

Almost surely, 2^51751812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51751812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69543936).

51751812 is an abundant number, since it is smaller than the sum of its proper divisors (87336060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51751812 is a wasteful number, since it uses less digits than its factorization.

51751812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4848 (or 4846 counting only the distinct ones).

The product of its digits is 2800, while the sum is 30.

The square root of 51751812 is about 7193.8732265727. The cubic root of 51751812 is about 372.6563450421.

The spelling of 51751812 in words is "fifty-one million, seven hundred fifty-one thousand, eight hundred twelve".